MARTEL, Edith, Government of Northwest Territories, Northwest Territories Geoscience Office, Yellowknife, NT X1A 2L9 Canada, edith_martel@gov.nt.ca

CRADDOCK, William, U. S. Geological Survey, Reston, VA 20192, wcraddock@usgs.gov and HOUSEKNECHT, David W., US Geological Survey, 12201 Sunrise Valley Drive, MS 956, Reston, VA 20192

DUSEL-BACON, Cynthia, USGS, 345 Middlefield Rd., MS 901, Menlo Park, CA 94025, cdusel@usgs.gov, O'SULLIVAN, Paul B., Apatite to Zircon, Inc, 1075 Matson Rd, Viola, ID 83872-9709, DAY, Warren C., US Geological Survey, MS 911, Denver, CO 80225, and BACON, Charles R., USGS, 345 Middlefield Rd, Menlo Park, CA 94025

MORTENSEN, James K., Department of Earth, Ocean and Atmospheric Sciences, Univ of British Columbia, 2020 - 2207 Main Mall, Vancouver, BC V6T 1Z4, Canada, jmortensen@eos.ubc.ca and DUSEL-BACON, Cynthia, USGS, 345 Middlefield Rd., MS 901, Menlo Park, CA 94025

SICARD, Karri R.¹, TWELKER, Evan¹, FREEMAN, Lawrence K.¹, WYPYCH, Alicja¹, BENOWITZ, Jeff², and KASS, M. Andy³, (1) State of Alaska, Division of Geological & Geophysical Surveys, 3354 College Rd, Fairbanks, AK 99709, karri.sicard@alaska.gov, (2) Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, (3) Crustal Geophysics and Geochemistry Science Center, US Geological Survey, Denver Federal Center, MS 964, Denver, CO 80225

BENOWITZ, Jeff¹, ROESKE, Sarah M.², TROP, Jeffrey M.³, DAVIS, Kailyn N.¹, FITZGERALD, Paul G.⁴, GILLIS, Robert J.⁵, ARMSTRONG, Phillip A.⁶, LAYER, Paul⁷, and O'SULLIVAN, Paul B.⁸, (1) Geophysical Institute and Geochronology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775, jbenowitz@alaska.edu, (2) Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA 95616, (3) Dept. of Geology, Bucknell University, 701 Moore Avenue, Lewisburg, PA 17837, (4) Department of Earth Sciences, Syracuse University, Syracuse, NY 13244, (5) Alaska Department of Natural Resources, Alaska Geological Survey, 3354 College Rd, Fairbanks, AK 99709, (6) Geological Sciences, California State University, Fullerton, 800 N. State College Blvd, Fullerton, CA 92834, (7) College of Natural Science and Mathematics, Univ of Alaska Fairbanks, PO 755780, Fairbanks, AK 99775, (8) Apatite to Zircon, Inc, 1075 Matson Rd, Viola, ID 83872-9709

BERANEK, Luke P., Department of Earth Sciences, Memorial University of Newfoundland, 300 Prince Philip Drive, St. John's, NF A1B 3X5, Canada, lberanek@mun.ca, VAN STAAL, Cees R., Geological Survey of Canada, 605 Robson Street, Vancouver, BC V6B 5J3, Canada, MCCLELLAND, William C., Department of Earth and Environmental Sciences, University of Iowa, 121 Trowbridge Hall, Iowa City, IA 52242, ISRAEL, Steve A., Yukon Geological Survey, 2099 2nd Ave, Whitehorse, YT Y1A 2C6, Canada, JOYCE, Nancy, Geological Survey of Canada, Ottawa, ON K1A 0E8, Canada, and FRIEDMAN, Richard M., Pacific Centre for Isotopic and Geochemical Research, Univ of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada

WILSON, Frederic H., Alaska Science Center, U.S. Geological Survey, 4210 University Dr, Anchorage, AK 99508, fwilson@usgs.gov

MANOR, Matthew J., Pacific Centre for Isotopic and Geochemical Research - Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, 2207 Main Mall, Room 2020 - Earth Sciences Building, Vancouver, BC V6T 1Z4, Canada, mmanor@eos.ubc.ca, SCOATES, James S., Pacific Centre for Isotopic and Geochemical Research - Earth, Ocean and Atmospheric Sciences, University of British Columbia, 2207 Main Mall, Room 2020 - Earth Sciences Building, Vancouver, BC V6T-1Z4, Canada, NIXON, Graham T., BC Geological Survey, Ministry of Energy and Mines, P.O. Box 9320, Stn Prov Govt, Victoria, BC V8W9N3, Canada, and AMES, Doreen E., Geological Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada

NEWSON, Andrew C., Moose Oils Ltd, 1927 10th Avenue. NW, Calgary, AB T2N 1G4 Canada, andy@mooseoils.com

BLUM, Mike, Department of Geology, University of Kansas, 1475 Jayhawk Blvd, University of Kansas, 1475 Jayhawk Blvd, Lawrence, KS 66047, mblum@ku.edu

BYERLY, Ad, Department of Geoscience, University of Wisconsin-Madison, Weeks Hall, 1215 West Dayton Street, Madison, WI 53715, abyerly@wisc.edu, TIKOFF, Basil, Department of Geoscience, University of Wisconsin, 1215 W Dayton St, Madison, WI 53706, GASCHNIG, Richard M., Department of Geology, University of Maryland, College Park, MD 20742, FAYON, Annia, Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, and VERVOORT, Jeffrey D., School of the Environment, Washington State University, Pullman, WA 99164

FAN, Majie, Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, TX 76019, mfan@uta.edu